Malicious PDF — malware analysis report

Static analysis result for SHA-256 8240c57f3ca9077e…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 18:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a7b9b09599f8bab4a533340d0a9b11c SHA-1: 038028730231cb8e64457834f092da5ef231da2e SHA-256: 8240c57f3ca9077ed4136ec10bf8a1cf2904c608e8808f9c1dd8c441d551b3b4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though obfuscated, contains a URL that matches the redirector, suggesting the primary purpose is to direct users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=call+me+maybe+instrumental In PDF document text
    • http://files.drewshanefield.com/uploads/1/3/1/6/131636890/sivetuvepixa.pdfIn PDF document text
    • http://xipob.sindenphotography.ca/uploads/1/3/1/4/131453134/314166.pdfIn PDF document text
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/88658265077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/96898164972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/tafsir_al_quran_bangla_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/gojelibenasagiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7173/7749/files/sociology_11th_class_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/jilomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/goblin_diplomacy_quick_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/26845441164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/vonufokimorek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/bounty_hunter_dotabuff_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/27788217640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/anti_social_reformers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/48340519461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7870/3518/files/selenium_automation_testing_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/worship_guitar_chord_inversions.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E7 4980 bytes
SHA-256: aadd794d6fd35ea8c460f2a296e129b75c641174bfece5fb959c96680a296a58
font_01_sfnt_off000066c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 9904 bytes
SHA-256: 7b5e6df37594d586363156ff0aa6f947e6caddb7dfcf71f02a91985520c3d268

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